feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

LICENSE

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+RSMon Worker Source-Available License 1.0
+
+Copyright (c) 2026 RSMon. All rights reserved.
+
+This software is not open source. No rights are granted except those expressly
+stated in this license.
+
+1. Permitted use
+
+Subject to this license, RSMon grants you a limited, non-exclusive,
+non-transferable, revocable license to:
+
+* inspect and evaluate the source code;
+* use the source code for private research and evaluation; and
+* modify and build the software solely to operate an RSMon worker connected to
+  the monitoring service hosted at rsmon.ru.
+
+2. Restrictions
+
+You may not, without prior written permission from RSMon:
+
+* use the software with any service other than rsmon.ru;
+* use the software to provide a competing or commercial monitoring service;
+* redistribute, publish, sell, sublicense, lease, or otherwise make the source
+  code, modified source code, binaries, or container images available to any
+  third party;
+* remove or alter copyright, license, attribution, or proprietary notices;
+* use RSMon names, logos, or trademarks except to identify compatibility with
+  rsmon.ru; or
+* use the software or source code for any purpose not expressly permitted by
+  section 1.
+
+3. Modifications
+
+Modifications and derivative works are subject to this license. You must keep
+this license and all copyright notices with every permitted copy. RSMon is not
+obligated to support, accept, or maintain modifications.
+
+4. Ownership
+
+RSMon and its licensors retain all right, title, and interest in the software,
+including all intellectual-property rights. No patent, trademark, or other
+license is granted by implication or estoppel.
+
+5. Termination
+
+This license terminates automatically if you breach any term. Upon termination,
+you must stop using the software and delete all copies in your possession or
+control.
+
+6. Disclaimer
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+PURPOSE, TITLE, AND NON-INFRINGEMENT. TO THE MAXIMUM EXTENT PERMITTED BY LAW,
+RSMON WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL,
+OR PUNITIVE DAMAGES, OR FOR LOSS OF DATA, PROFITS, OR BUSINESS, ARISING FROM OR
+RELATED TO THE SOFTWARE OR THIS LICENSE.
+
+7. Additional permission
+
+For permissions beyond this license, contact RSMon through https://rsmon.ru.